syzbot


WARNING in btrfs_remove_chunk (2)

Status: upstream: reported C repro on 2023/12/20 03:26
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+456f974c2381aae882ce@syzkaller.appspotmail.com
First crash: 426d, last: 1d15h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2024/02/19 upstream (ToT) b401b621758e C [report] BUG: MAX_LOCKDEP_CHAINS too low!
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in btrfs_remove_chunk origin:upstream missing-backport C inconclusive 64 3d02h 703d 0/3 upstream: reported C repro on 2023/03/17 14:37
upstream WARNING in btrfs_remove_chunk btrfs C error inconclusive 257 2d16h 811d 0/28 upstream: reported C repro on 2022/11/30 08:16
linux-6.1 WARNING in btrfs_remove_chunk origin:lts-only C done 10 599d 690d 3/3 fixed on 2023/09/19 11:51
Fix bisection attempts (5)
Created Duration User Patch Repo Result
2024/08/14 23:30 1m bisect fix linux-6.1.y error job log
2024/07/05 10:30 2h36m bisect fix linux-6.1.y OK (0) job log log
2024/05/26 08:28 2h18m bisect fix linux-6.1.y OK (0) job log log
2024/04/21 08:10 2h40m bisect fix linux-6.1.y OK (0) job log log
2024/03/19 23:32 2h40m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4801 at fs/btrfs/volumes.c:3259 btrfs_remove_chunk+0x1364/0x18e8 fs/btrfs/volumes.c:3259
Modules linked in:
CPU: 1 PID: 4801 Comm: syz-executor515 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : btrfs_remove_chunk+0x1364/0x18e8 fs/btrfs/volumes.c:3259
lr : btrfs_remove_chunk+0x1364/0x18e8 fs/btrfs/volumes.c:3259
sp : ffff8000228075e0
x29: ffff800022807760 x28: ffff0000e1a986dc x27: ffff0000e1a986e0
x26: dfff800000000000 x25: ffffffffffffffe4 x24: ffff0000caab58f0
x23: ffff700004500ed4 x22: 1fffe0001982c440 x21: ffff0000cc162200
x20: 0000000000000006 x19: 0000000000000000 x18: 1fffe0003679cb76
x17: ffff800015aed000 x16: ffff800008302574 x15: ffff0001b3ce5bbc
x14: 1ffff00002b5e0b2 x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000003 x9 : 4ae281b732787100
x8 : 4ae281b732787100 x7 : ffff8000082783ec x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff80001247d5a0 x0 : ffff80019e2a1000
Call trace:
 btrfs_remove_chunk+0x1364/0x18e8 fs/btrfs/volumes.c:3259
 btrfs_delete_unused_bgs+0xa58/0xd00 fs/btrfs/block-group.c:1528
 btrfs_remount+0xb84/0x121c fs/btrfs/super.c:2076
 legacy_reconfigure+0xfc/0x114 fs/fs_context.c:655
 reconfigure_super+0x318/0x7a4 fs/super.c:977
 do_remount fs/namespace.c:2712 [inline]
 path_mount+0xc70/0xe5c fs/namespace.c:3378
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount fs/namespace.c:3584 [inline]
 __arm64_sys_mount+0x498/0x588 fs/namespace.c:3584
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 1040
hardirqs last  enabled at (1039): [<ffff80000827848c>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (1039): [<ffff80000827848c>] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:5000
hardirqs last disabled at (1040): [<ffff80001231b6dc>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1024): [<ffff8000081c2ff0>] softirq_handle_end kernel/softirq.c:421 [inline]
softirqs last  enabled at (1024): [<ffff8000081c2ff0>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:606
softirqs last disabled at (1005): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:612
---[ end trace 0000000000000000 ]---
BTRFS info (device loop2: state MA): dumping space info:
BTRFS info (device loop2: state MA): space_info DATA+METADATA has 1523712 free, is not full
BTRFS info (device loop2: state MA): space_info total=3276800, used=53248, pinned=0, reserved=4096, may_use=1695744, readonly=0 zone_unusable=0
BTRFS info (device loop2: state MA): space_info SYSTEM has 8253440 free, is not full
BTRFS info (device loop2: state MA): space_info total=12451840, used=4096, pinned=0, reserved=0, may_use=0, readonly=4194304 zone_unusable=0
BTRFS info (device loop2: state MA): global_block_rsv: size 1441792 reserved 1433600
BTRFS info (device loop2: state MA): trans_block_rsv: size 262144 reserved 262144
BTRFS info (device loop2: state MA): chunk_block_rsv: size 0 reserved 0
BTRFS info (device loop2: state MA): delayed_block_rsv: size 0 reserved 0
BTRFS info (device loop2: state MA): delayed_refs_rsv: size 262144 reserved 0
BTRFS: error (device loop2: state MA) in btrfs_remove_chunk:3259: errno=-28 No space left

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/16 20:01 linux-6.1.y 0cbb5f65e52f 40a34ec9 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/11/03 21:42 linux-6.1.y 7c15117f9468 f00eed24 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/02/18 21:40 linux-6.1.y 8b4118fabd6e 578f7538 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/11/30 04:22 linux-6.1.y e4d90d63d385 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in btrfs_remove_chunk
2024/11/30 04:20 linux-6.1.y e4d90d63d385 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in btrfs_remove_chunk
2024/11/30 04:16 linux-6.1.y e4d90d63d385 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in btrfs_remove_chunk
2024/11/27 08:28 linux-6.1.y e4d90d63d385 52b38cc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in btrfs_remove_chunk
2024/11/23 01:40 linux-6.1.y e4d90d63d385 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in btrfs_remove_chunk
2025/02/16 19:00 linux-6.1.y 0cbb5f65e52f 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/12/22 03:36 linux-6.1.y 29f02ec58a94 d7f584ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/11/26 09:50 linux-6.1.y e4d90d63d385 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/11/03 17:09 linux-6.1.y 7c15117f9468 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2024/01/10 02:11 linux-6.1.y 38fb82ecd144 b438bd66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
2023/12/20 03:26 linux-6.1.y ba6f5fb46511 3ad490ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in btrfs_remove_chunk
* Struck through repros no longer work on HEAD.